dfitoimd: decoding Intel M2FM floppy flux images (was Re: Intel 432 floppy flux images for decoding)

[dwight]

I was having problems recovering inner tracks on some 5.25 disk. I added some extra screws that allowed me to move the head both radially and up and down.

I was able to recover more but still didn't get it all.

The up and down allowed a little rotation as well as tracking.

On the inner tracks a small up or down looks like the head is

rotated slightly.

I just looked at the analog amplitude. I was just using a controller

card instead of sampling.

Dwight

________________________________
From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Chuck Guzis <cclist at sydex.com>
Sent: Tuesday, August 9, 2016 12:33:24 AM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: dfitoimd: decoding Intel M2FM floppy flux images (was Re: Intel 432 floppy flux images for decoding)

On 08/08/2016 11:48 PM, Eric Smith wrote:
> On Mon, Aug 8, 2016 at 11:06 PM, Chuck Guzis <cclist at sydex.com>
> wrote:

>> At the expense of sounding like a complete idiot, have you checked
>> the alignment of the drive?
>
> I can't. I only have the images.

That's unfortunate.  I run into mis-aligned disks not infrequently.  I
don't know how to correct that one with software.  When making cw-type
images, you can usually just inspect the histogram for a track and tell
by the groupings whether you're on track or not.

--Chuck